Rectangular framework clamp



Nov. 25, 1952 J. D. NASH 2,619,136

RECTANGULAR FRAMEWORK CLAMP Filed July 10, 1950 John 0. Nash v INVENTOR.

Patented Nov. 25, 1952 UNITED STATES PATENT OFFICE RECTANG LAR F ORKCLAMP John D. Nash, Boston, Mass.

application July 10, 1950, Serial No. 172,802

2 Claims.

Th en ion relat s t oms g neral a more a i ul to a r c an ar cl mp ortheuse of cabinet makers, woodworkers and the like.

A primary object of this invention is to provide a clamp which can beused for grasping an object on two opposing sides or allfour sides of arectangular objfict.

Another object of this invention is to provide a clamp of rectangluarform, two of the main bar members being hinged together, While two morebar members are slidably mounted on the first mentioned bar member formovement relative thereto and substantially normal thereto, and thehinged members have reduced inside corner portions adjacent the hingeconnection, so that the corresponding co n r 9i Wo k cla ped in h clampwill not be damaged.

Another object of this invention is to provide a rectangular clamp inwhich all the parts are connected together, thus preventing the makingof the clamp inoperative by the loss of a component part.

A last object to be mentioned specifically is to provide a, clamp of thecharacter mentioned above, which is relatively inexpensive andpracticable to manufacture, which is safe, simple and convenient to useunder many difierent conditions, and which will give generally efiicientand durable service.

With these objects definitely in view, this invention resides in certainfeatures of construction, combination and arrangement of elements andportions as will be hereinafter described in detail in thespecification, particularly pointed out in the appended claims, andillustrated in the accompanying drawing which forms a material part ofthis application, and in which:

Figure 1 is a view of the assembled clamp, in perspective Figure 2 is avertical sectional view taken on the line 22 of Figure 1;

Figure 3 is a fragmentary vertical sectional view taken on the line 33in Figure 1;

Figure 4 is a fragmentary top plan view of one corner portion of thedevice; and

Figure 5 is a vertical sectional view taken on the line 5--5 of Figure4.

Similar characters of referencedesignate similar or identical elementsand portions throughout the specification and throughout the differentviews of the drawing.

Referring now to the drawing in detail, this invention includes fourmain bar members, which will be referred to as the first bar member It,the second bar member l2, the third bar member 14 and the fourth barmember I6. The first bar 2 member ha a e uc d p rt on 18 htehh d its d ad a hh tiqh ?9 9 the fi thar hi h her '0 ha a hal 1hr hihh hoh sc ioh,hd s ted at with an a .QP PFQn O th SfiQPilQ ar ber 12- A P vbt P i 24xtend thro h the a ed rorhhhs that s, thr u h h rh ihhs i nd 6- 'It 1.91 9 he care l y hh hd ha th i h ah ion is very limit d. how ver an thah firs an se o d bar membe s w a l ime e ret d ub antiall norma to a h ehe Th rs has techno ba membe s hav hd toa tihe end orhhhs P ov in a n rea an ke 38 a ia hht ai hin e t nn stioh, so t a the hh e hchq h h rhe ft work am ed in theqhv he w l ho be ammed nd thus dama ed The .se qhsiand third ba th hers a d '4 are Pro id d w th o ud nal y e din lots 9ahd 3? host a each nd ah e first and PW 5%! members a o de h en r edheaded nds 4 ah 3 hi e t e u d rt h httrmedi te h n o h first and fourthmembers are received in the slots 39 and 3? t eing not d tha a similar na ed aded end 38 oh th eh 0 t e t u th ba 191 1- ber remote from theterminal 36 is arranged in opposing relation to a terminal portion 40 ofthe first member l0. Elongated threaded clamping bolts 42, having heads44 and wing nuts 46 extend through apertures provided in opposing pairsof ends of the second and third bar members l2 and I l. Similar clampingbolts 48 extend through apertures in the headed ends 34 and 3S and theheaded ends 38 and 40, respectively.

The bar members may be said to comprise two pairs and those of the firstpair are denoted by the numerals l2 and I4 while those of the secondpair are denoted by the numerals l0 and I 6. The slot 32 accommodatesthe reduced and headed end 38 while the slot 30 accommodates therespective heads 34 and 36 and their adjacent reduced ends. The enlargedheaded ends of the bar members It and I8 of the second pair are such asto permit the assembling as Well as the disassembling of the over-allclamping frame; that is, each headed end (34, 36 and 38) is enlarged inonly one transverse direction or dimension, the other transversedimension or crosssection being slightly less than the width of thecoacting assembling and retaining slot.

The clamp operates in the following manner. For the purpose of thisexplanation it is assumed that a rectangular object (herein referred toas the work) is to be clamped with pressure on each of its four sides,although, if desired, two or more plates, or in fact any similarobjects,

3 could be clamped together while utilizing only two of the four sidesof the clamp.

The work is introduced into the clamp so that all four sides or bars ofthe clamp surround the work. One corner of the work is then moved intothe point where the bars or sides I and I2 are joined by the rivet-boltat 24. The corner of the work does not come into contact with the clamp,thus protecting it from damage. Side bar I9 is then moved in until itmeets the work and the wing nuts are run up to fix the position of thisside. The triple-threaded action of the wing nuts and bolts speed upthis operation measurably. Side bar 14 is then moved to the desiredposition, and in like manner its position is also fixed. Then, with acarpenters framing square, try-square or some similar tool, exactadjustments may be made by tightening or loosening one or more of thewing nuts.

Having described the invention, what is claimed as new is:

1. A work clamp comprising a clamping frame characterized by fourcomplemental bar members arranged in two distinguishable pairs, the barmembers of the first pair being commensurate in length with each otherand disposed in opposed spaced parallelism and each bar member having aguide and assembling slot therein terminating at its ends inwardly ofthe respective outer ends of said bar member, a second pair of a spacedbar members also opposed to each other and disposed in substantialparallelism with each other but at right angles to the bar members ofthe first named pair and having reduced intermediate body portions andenlarged headed ends,

one end portion of one of the bar members of the first named pair havinga notch therein and the corresponding end of one of the bar members ofthe second named pair having a notch therein, the respective notchedends being overlapped and interlocked by way of the cooperating notchesand providing a hinging connection between the respective notched barmembers, the reduced portion of said one bar member at the end oppositeto said notch extending through the slot in the second one of said firstnamed pair of bar members with the headed end projecting outwardly ofthe face of said latter bar member, the reduced end portions of thesecond bar member of said second named pair of bar members extendingthrough the slots in the respective bar members of said first named pairof bar members with the cooperating headed ends projecting outwardly ofthe faces of latter bar members, said headed ends being enlarged only inone transverse dimension and the other transverse dimension being lessthan the widths of said slots to facilitate assembling and disassemblingof said frame, and manually regulable means connecting the respectivebar members of the first and second pairs with one another.

2. The structure defined in claim 1 wherein a. hinge pin serves topermanently join the respective notched ends of the stated bar membersand wherein the coacting interior surfaces of the corner provided bysaid hinged ends are relieved and thus reduced to define the work cornerclearance pocket, and wherein the adjustable connecting means betweenthe bar members of the respective pairs comprises, in each instance, abolt connected at one end with a coacting end of a coacting bar memberand having its opposite end provided with a thumb nut and operativelyconnected with a corresponding end of the complemental bar member.

JOHN D. NASH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 903,996 Markham Nov. 17, 19081,149,241 Wooton Aug. 10, 1915 1,209,761 Roos Dec. 26, 1916 FOREIGNPATENTS Number Country Date 36,881 Denmark Dec. 5, 1926

